Internal-combustion engine



L. B. KERSHAW.

iNTERNAL COMBUSTION ENGINE. APPLICATION FILED OCT. 25, 1919.

1 ,:3U,8 l 2 Patented Oct. 3, 1922.

Fa 1 F CAD LOU B. KEPMSHAEV, 0F DENVER, COLURADG.

INTEENAL-COMB STIUN EITGINE.

application filed tictober 25, 1919.

To all whom it may concern:

Be it known that I, Lon l3. ll'nnsnaw, a citizen of the United States, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful improvements in Internal-Combustion Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which, it appertains to make and use the same.

This invention relates to internal combu tion engines, and while particularly adapted to the two cycle internal combustion engine having an internal connpression chamber, is not limited thereto.

An object of this invention is to provide a means for floating a head within a hollow piston in order to form a fuel con'ipression chamber within the piston of an internal combustion engine. It has been found in internal combustion engines ot this type, that it is very diflicult to keep the same properly centered relative to the reciprocating sleeve of the piston enclosing said head.

The invention consists in a means for floating an internal head of the character described in such manner that it automatically and freely centers itself within. the piston sleeve, but resists the force oi con1- pression, suction and other forces tending to move it axially of the piston. lit also consists in the combination. arrangement and details of parts more particularly set -forth hereinalter and defined. in the appended claims.

fln the drawings:

Figure l a medial vertical section through an internal combustion engine having an internal compression head.

Figure 2 is a section at 2-2 in Figure 1 looking in the direction of the arrows.

Figure 3 is a section at 3-3 in Figure 1 looking in the direction of the arrows.

lhe general construction to which this invention is applied is illustrated in United States patents to Edwin T. Kershaw, Numbers 1,865,500, patented January 11, 19:21, and 1,387,077, patented April 13, 1920.

ln the accompanying drawings Z) indicates any suitable base and crank case in which is mounted a crank 0 adapted to operate a connecting rod (Z pivoted at its upper end to a wrist pin 6 mounted at the lower end of the sleeve 6 ot a hollow piston the head of which is indicated (i said piston being adapted Serial No. 333,256.

to reciprocate fluid tight within the cylinder 7. V

Fitted fluid tight within the interior surface 5 of said sleeve 6 of the piston is a head 1 consisting of an inverted cup-shaped body having its outer circumferential wall in substantial. engagement with the inner surface 5 of said sleeve 6 and made fluid tightby suitable packing members such the ordinary elastic piston rings. in order to hold said head 1 from moving longitudinally of the axis of the cylinder an anchor member 52 is provided, said anchor member being a oar rigidly secured to the base (3 of the engine by means oi the cross member 3, as shown. The said bar 2- Qfittllflf; within the sleeve 6 and ca ies at its upper or free end a transverse pin 2- over which is sleeved a sleeve member l. bolted or otherwise secured to the head 1 between the upper and lower ends of the wall of said cup-shaped head. By the described means the said. cupshaped head. is giivotally and slidably mounted within the cavity of said head on said member or bar 2 so that said head rock slightly about the a is of the pin 2 and may slide slightly longitudinally of the axis oi? said pin.

It will be understood that means are provided for admitting a preliminary charge of fuel mixture within the space between thehead 1 and the piston head 6 and means for discharg ring the preliminarily compressed charge from said chamber to the combustion space above the piston head.

By the construction shown the said head I is prevented from moving longitudinally with respect to the axis oi. the cylinder but may ad] 1st itself freely within the sleeve 6 as the piston reciprocates in such manner as to keep the circumferential walls of the head in fluid tight contact with the inner surface of the sleeve without any danger of binding or causing encessive wear.

It will be evidentthat the construction here shown and described may be varied without departing from the substance and object of this invention namely, the mounting of an internal compression head in such a manner as to permit its movement upon and in relation to its support or mount.

Claims:

1. In an internal combustion engine comprising a base, a cylinder and a piston provided with a sleeve; a member extending into the sleeve and held against movement longitudinal of the cylinder, a head having a circumferential wall fitting the interior surface of the sleeve and forming with the piston a compression chamber adapted to receive fuel mixture, compress it and deliver it to the combustion space in proper sequence; and a pivotal connection between said head and said member.

2. In an internal combustion engine com prising a base, a cylinder, and a piston provided with a sleeve; a member extending into the sleeve and held against movement longitudinal of the cylinder; a head having a circumferential wall fitting the interior surface of the sleeve and forming with the piston a compression chamber adapted to receive fuel mixture, compress it and deliver it to the combustion space in proper sequence; and a connection between said head and d member permitting a sliding movement of the head thereon transverse of the path of movement of the piston.

3. In an internal combustion engine comprising a base, a cylinder, and a piston provided with a sleeve; a member extending into the sleeve and held against movement longitudinal of the cylinder; a head having a circumferential wall fitting the interior surface of the sleeve and forming with the piston a compression chamber adapted to receive fuel mixture, compress it and deliver it to the combustion space in proper sequence; and a pivot connection between said head and said member so constructed as to permit a rocking movement about said pivot. on an axis transverse of the path of movement of the piston and a sliding movement along said axis.

4. In an internal combustion engine comprising a base, a cylinder and a piston provided with a sleeve; a member extending into the sleeve and held against movement '3. Acetic longitudinal of the cylinder a head having a circumferential wall fitting the interior surface of the sleeve and forming with tl e piston a compression chamber adapted to receive fuel mixture, compress it and deliver it to the combustion space in proper sequence; said head having a floating connection to said member between the ends of its circumferential wall.

5. In an internal combustion engine comprising a base, a cylinder and a piston provided with a sleeve; a member extending into the sleeve and held at one end against movement longitudinal of the cylinder; an. inverted cup-shaped head having circumferential Wall fitting the interior surface of the sleeve and forming with the piston a compression chamber adapted to receive fuel mixture, compress it and deliver it to the combustion space in proper sequence, said inverted cup-shaped head having a fli'iating connection to the other end of said member between the ends of its circumferential wall.

6. In an internal combustion engine, con:- prising a base, a cylinder and a piston provided with a sleeve; a rod havingone and secured r 4 with respect to the base, said rod extending into the sleeve and having a transverse bearing member on its two end; an inverted cup-shaped head having a circumferential wall fitting the interior surface of the sleeve and forming with the piston a compression chamber adapted to receive fuel mixture, compression it and deliver it to the combustion space in proper sequence; sleeve secured to said head and located within the cup-shaped cavity there of, said sleeve having a pivotal and slidable connection with the transverse bearing mem her on said rod.

In testimony whereof I aflix my signature.

LOU B. KElttnl-DUV. 

